Utility maximization for layered transmission using the broadcast approach

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We investigate the power allocation problem in layered transmission with successive enhancement using the broadcast approach. This problem is particularly important for multimedia streaming applications and multicasting services over slowly fading channels with partial channel information at the transmitter. We consider the practical scenario of limited and pre-specified source layers, and we propose a generic and efficient solution to optimize the transmission power allocated to each layer in order to maximize the average user satisfaction defined by a utility function of the decoded layers. We assume a block-fading Rayleigh distributed channel model. However, our solution can be extended to a number of other channel distributions. Although the direct formulation of the problem is not convex, we propose change of optimization variable, and we use the dual problem and the perturbation analysis in order to obtain the optimal solution. The solution is based on a one-dimensional bisection search irrespective of the total number of layers. Our optimality analysis indicates that in some cases it may not be optimal to transmit all the layers.

Original languageEnglish
Article number6138835
Pages (from-to)1228-1238
Number of pages11
JournalIEEE Transactions on Wireless Communications
Volume11
Issue number3
DOIs
Publication statusPublished - Mar 2012

Fingerprint

Utility Maximization
Broadcast
Multicasting
Rayleigh fading
Power transmission
Fading channels
Transmitters
Multimedia Streaming
Rayleigh Fading
User Satisfaction
Bisection
Channel Model
Perturbation Analysis
Power Allocation
Dual Problem
Fading Channels
Efficient Solution
Utility Function
Transmitter
Optimality

Keywords

  • Broadcast approach
  • non-convex optimization
  • power allocation
  • successive refinement of information
  • utility function maximization

ASJC Scopus subject areas

  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Utility maximization for layered transmission using the broadcast approach. / Shaqfeh, Mohammad; Mesbah, Wessam; Alnuweiri, Hussein.

In: IEEE Transactions on Wireless Communications, Vol. 11, No. 3, 6138835, 03.2012, p. 1228-1238.

Research output: Contribution to journalArticle

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